/Engine/Source/Runtime/Engine/Public/Elements/Framework/EngineElementsLibrary.h
static [FTypedElementHandle](API\Runtime\TypedElementFramework\Elements\Framework\FTypedElementHandle) AcquireEditorSMInstanceElementHandle ( const [UInstancedStaticMeshComponent](API\Runtime\Engine\Components\UInstancedStaticMeshComponent) * ISMComponent, const int32 InstanceIndex, const bool bAllowCreate )